INOCULANT-­MIN 56H
Alloy Description: MIN 56H is a Ferro silicon bases inoculant contain controlled level of barium
and calcium. This inoculant is especially designed to utilize the combined effect of barium and
calcium to give optimum inoculating effect and good fade resistance. Due to these qualities it
is very effective in thick and medium section casting.
MIN 56H is also equal effective in thin section casting, because it produces high initial cell
number and is efficient chill reducer.
Chemical composition:
Elements Composition (%) Silicon Barium Calcium Aluminum Manganese Iron MIN56HA1 72 – 76 2 – 3 1 – 2 1.5 max -­-­ Balance MIN56HA2 60 – 65 2 – 3 1 – 2 1.5 max -­-­ Balance Physical properties:
MIN56HA3 46 – 50 7 – 11 1.5 – 2.5 2 – 3 1.2 – 1.5 Balance Melting Range Apparent Density Bulk density 1208 °C – 1325 °C 3.1 gm/cm3 1.75g/cm3 Solubility and Reactivity: Insoluble in water but soluble in mineral acids and release hydrogen. May forms posphine and arsine gas in contact with water, acids and bases.
Effects in Iron:
MIN 56H is very effective chill reducer for both low & high sulphur gray iron and ductile iron. Due
to good fade resistance its normally used in medium and thick casting section, although it is also
a potent inoculant in thin section casting. MIN 56H can be preferred where wide range of
pouring temperature and pouring time is unavoidable.
The use of MIN 56H inoculant with nodularizer FeSiMg alloy (as MIN 56H inoculant in the cover
material in sandwich process) in the production of ductile iron is beneficial. As the barium
containing in the inoculant change the phase composition of slag generated during th
Figure – 1, distribution of calcium,
aluminium, sulhides, iron containing slag
phases in the sandwich treatment ladle
(surface, wall, and pocket ) and in
autopour (inlet, surface, bottom, stopper,
and nozzle ).
Figure – 2, distribution of barium containing
slag phases in treatment ladle and
autopour.
Pouring Reliability Into Your Melt -­ Alloying Solution in Foundry Industry
INOCULANT-­MIN 56H
the nodularizing process. This barium containing slag settled in the treatment ladle as shown in
figure -­2. Then less slag will be transferred from treatment ladle to autopour unit, therefore less
filter/ nozzle clogging, less built of slag on stopper rod. Hence reduce the cost of cleaning and
maintenance of autopour unit.
variation in thin and thick section
MIN 56H inoculant help to reduce the nodule count and size
casting of ductile iron. For example as shown in figure -­ 3
MIN 56H is also a very effective
preconditioner can be used in
both gray and S.G iron. And
also as first step inoculant in
two step inoculation process,
especially for big castings.
Figure -­3 (a)Microstructure
of ductile iron of thick
section at 100X
Figure -­3 (b)Microstructure
of ductile iron of thin
section at 100X
Advantages:
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Addition Technique: MIN 56H inoculant can be added in ladle as well as in metal stream in both
gray and S.G Iron.
Addition in Gray Iron: Addition rate in ladle will be 0.2 – 0.4 % and the addition in metal stream
will be 0.06 – 0.15 %. If used as first step inoculation or preconditioner the addition rate will be
0.12 – 0.5 %.
Addition in Ductile Iron: Addition rate in ladle will be 0.3 – 0.5 % and the addition in metal stream
will be 0.1 – 0.25 %. If used as first step inoculation or preconditioner the addition rate will be 0.12
– 0.5 %. When it is used with nodularizer (FeSiMg alloy) as a slag conditioner the addition rate will
be 0.05 – 0.1 %.
Standard size:
0.2 – 0.7 mm Stream Inoculation 1.0 – 3.0 mm Small ladle 2.0 – 6.0 mm Large ladle Or size as per customer requirement
Storage: Keep in Cool and dry places.
Safety: Material Safety data sheet can be supplied on demand.
Pouring Reliability Into Your Melt -­ Alloying Solution in Foundry Industry